金属粒子分散相与某些介质材料基体形成的复合材料具有独特的光学、电学等性质.但目前的研究主要集中在光学性质方面,而对这类材料的电学性质研究得很少.氧化锌压敏电阻器的微观结构为半导化的ZnO晶粒被一层很薄的绝缘相所包围,该绝缘相所形成的高阻晶界具有隧道效应,从而使材料具有抑制电压和吸收浪涌电流的功能,由于半导体ZnO晶粒仍具有一定电阻值,所以在一些大电流场合,其伏安特性的电压值随电 However, the current research mainly focuses on the optical properties, but few studies on the electrical properties of these materials. ZnO pressure The microstructure of a varistor is that the semiconducting ZnO grains are surrounded by a thin insulating phase which forms a tunnel of high impedance grain boundaries so that the material has voltage suppression and surge absorption The function of the semiconductor ZnO grains still have a certain resistance, so in some high-current occasions, the voltage and voltage characteristics of the voltage with the power